John has been to the aquarium.
约翰曾经去过水族馆。
One of his latest projects has been to make plants grow in experiments using some common vegetables.
他最近的一个项目是把一些常见的蔬菜在运用到实验中，让植物生长。
The unintentional consequence has been to halt the natural eradication of underbrush, now the primary fuel for megafires.
意外\的后果是阻止了对灌木丛的天然清理，而它们现在成了超级大火的最主要的燃料。
Our policy has been to uphold the law.
我们的政策一直是维护法律。
Everyone in my class except Tom and Mary has been to Beijing.
除了汤姆和玛丽，我们班的每个人都去过北京。
Neither Jim nor Tom has been to Australia before, but they know the country very well.
吉姆和汤姆以前都没去过澳大利亚，但他们对这个国家非常了解。
Laura has been to London at least twice so far.
劳拉到目前为止至少去过伦敦两次。
He has been to Canberra, the capital city of Australia.
他去过澳大利亚的首都——堪培拉。
Almost everyone in our group has been to the 2nd Digital China Summit.
我们组几乎每个人都参加过第二届神州数码高峰论坛。
The overall goal of her work has been to depict the world of the soul and the spirit, not to mirror concrete reality.
她作品的总体目标是描绘灵魂和精神的世界，而不是反映具体的现实。
The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing.
这样做的总体结果就是业余爱好者想在专业地质学期刊上发表文章就更难了，而评审制度的广泛采用又进一步加强了这一结果。
他念过中学。
他到过非洲。
Apparently, he has been to the gym.
他显然还在健身房锻炼过。
But its policy has been to avoid all scrutiny.
但目前的政策是避开一切调查。
Tom has been to Japan, I have also been there.
汤姆曾去过日本，我也曾去过。
The most obvious change has been to their shape.
最明显的变化就是它们形状的变化。
A third mistake has been to ignore the needs of the young.
第三个失策是忽视年轻人需求。
If the decision has been to go barefoot, all go barefoot.
如果决定要赤脚走路，大家便一齐赤着脚走。
Her campaign's other error has been to make personal attacks.
她竞选活动的其它失策已经要被包装成受到了人身攻击。
The greatest success of Kosovo has been to avert a Serb exodus.
科素沃所取得最大一项成功就是避免了塞族人的逃离。
Post offices are expensive, so the answer has been to shut them down.
邮局是昂贵的，所以答案是关闭他们。
One of them has been to get young Americans engaged with the game.
其中之一就是让美国的年轻人参与到这项游戏中来。
Meese said she has been to the base, which is in a big nature park.
米斯说她曾到过那个山区，那是个大型自然公园。
A secondary mission has been to produce a language which compiles quickly.
第二个目标是生产一个编译速度很快的语言。
For many years, marathon wisdom has been to include a weekly long run.
多年以来，马拉松的学问都包括周期性的长跑。
Mr McCain's great hope has been to win a greater share of white women.
麦凯恩的最大愿望就是能赢得更多的白人女性选民。
So one of the themes of the course has been to look at the different kinds.
所以这门课的主旨之一，就是要看看这些不同形式之间的区别。
So one of the themes of the course has been to look at the different kinds.
所以这门课的主旨之一，就是要看看这些不同形式之间的区别。
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